Java 将配置属性转换为枚举值

Converting configuration properties to enum values

提问by thg

I have a configuration file which contains this line:

我有一个包含这一行的配置文件：

login.mode=PASSWORD

and an enum

和一个枚举

public enum LoginMode {
PASSWORD, NOT_PASSWORD, OTHER }

and a spring bean

和一个春豆

<bean id="environment" class="a.b.c.Environment" init-method="init">
  <property name="loginMode" value="${login.mode}"/>
</bean>

and of course a bean class

当然还有一个bean类

public class Environment {
    private LoginMode loginMode;

    public LoginMode getLoginMode() {
        return loginMode;
    }

    public void setLoginMode(LoginMode loginMode) {
        this.loginMode = loginMode;
    }
}

How can i convert the property of the configuration file (which is a String) into the corresponding enum value of LoginMode?

我如何将配置文件的属性（它是一个字符串）转换为 LoginMode 的相应枚举值？

EDIT: i know how to get the enum value of a string input, but the issue is another one: If i try this:

编辑：我知道如何获取字符串输入的枚举值，但问题是另一个：如果我尝试这个：

public class Environment {
    private LoginMode loginMode;

    public LoginMode getLoginMode() {
        return loginMode;
    }

    public void setLoginMode(String loginMode) {
        this.loginMode = LoginMode.valueOf(loginMode);
    }
}

spring is complaining about getter and setter not having the same input and output type.

spring 抱怨 getter 和 setter 没有相同的输入和输出类型。

Bean property 'loginMode' is not writable or has an invalid setter method. Does the    parameter type of the setter match the return type of the getter?

采纳答案by thg

Spring automatically converts input Strings to the corresponding valueOf of the desired enum.

Spring 自动将输入字符串转换为所需枚举的相应 valueOf。

回答by Eel Lee

You can do that by

你可以这样做

LoginMode.valueOf("someString");

回答by smajlo

 LoginMode.valueOf(valueOfProperty);

EDIT: Try using converter http://docs.spring.io/spring/docs/3.0.0.RC2/reference/html/ch05s05.htmlhttp://forum.spring.io/forum/spring-projects/web/83191-custom-enum-string-converters

编辑：尝试使用转换器 http://docs.spring.io/spring/docs/3.0.0.RC2/reference/html/ch05s05.html http://forum.spring.io/forum/spring-projects/web/ 83191-custom-enum-string-converters

EDIT2: also check this: How assign bean's property an Enum value in Spring config file?

EDIT2: 还要检查这个： How assign bean's property an Enum value in Spring config file?